999822435872 has 54 divisors (see below), whose sum is σ = 2131619948703. Its totient is φ = 461422570752.

The previous prime is 999822435839. The next prime is 999822435907. The reversal of 999822435872 is 278534228999.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 7415965456 + 992406470416 = 86116^2 + 996196^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=707044.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 73525778 + ... + 73539374.

Almost surely, 2^999822435872 is an apocalyptic number.

It is an amenable number.

999822435872 is an abundant number, since it is smaller than the sum of its proper divisors (1131797512831).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999822435872 is an frugal number, since it uses more digits than its factorization.

999822435872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27230 (or 13612 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 68.

The spelling of 999822435872 in words is "nine hundred ninety-nine billion, eight hundred twenty-two million, four hundred thirty-five thousand, eight hundred seventy-two".